/*
    dw_sizerdx.js version date: Feb 2006
    requires dw_cookies.js
*/

/*************************************************************************
  This code is from Dynamic Web Coding at dyn-web.com
  Copyright 2004-6 by Sharon Paine 
  See Terms of Use at www.dyn-web.com/bus/terms.html
  regarding conditions under which you may use this code.
  This notice must be retained in the code as is!
*************************************************************************/

var dw_fontSizerDX = {
    sizeUnit:       "px",
    defaultSize:    14,
    maxSize:        24,
    minSize:        10,
    queryName:      "dw_fsz",   // name to check query string for when passing size in URL
    queryNum:       true,       // check query string for number only (eg. index.html?18 )
	adjustList:[],
	setDefaults : function(unit,dflt,mn,mx,sels){
		this.sizeUnit=unit;
		this.defaultSize=dflt;
		this.maxSize=mx;
		this.minSize=mn;
		if(sels)
			this.set(dflt,mn,mx,sels);
	},
	set : function(dflt,mn,mx,sels){
		var ln=this.adjustList.length;
		for(var i=0;sels[i];i++){
			this.adjustList[ln+i]=[];
			this.adjustList[ln+i]["sel"]=sels[i];
			this.adjustList[ln+i]["dflt"]=dflt;
			this.adjustList[ln+i]["min"]=mn||this.minSize;
			this.adjustList[ln+i]["max"]=mx||this.maxSize;
			this.adjustList[ln+i]["ratio"]=this.adjustList[ln+i]["dflt"]/this.defaultSize;
		}
	},
	init : function(){
		if(!document.getElementById || !document.getElementsByTagName || !dw_fontSizerDX.ready)
			return;
		var size,sizerEl,i;
		size=getValueFromQueryString(this.queryName,this.queryNum);
		if( isNaN(parseFloat(size)) || size>this.maxSize || size<this.minSize ){
			size=getCookie("fontSize");
			if( isNaN(parseFloat(size)) || size>this.maxSize || size<this.minSize){
				size=this.defaultSize;
			}
		}
		this.curSize=this.defaultSize;
		sizerEl=document.getElementById('sizer');
		if(sizerEl)sizerEl.style.display="block";
		if(this.adjustList.length==0){
			this.setDefaults(this.sizeUnit,this.defaultSize,this.minSize,this.maxSize,['body','td']);
		}
		if(size!=this.defaultSize)
			this.adjust(size-this.defaultSize);
	},
	adjust : function(n){
		if(!this.curSize || !dw_fontSizerDX.ready)
			return;
		var alist,size,list,i,j;
		if(n>0){
			if(this.curSize+n>this.maxSize)
				n=this.maxSize-this.curSize;
		}else if(n<0){
			if(this.curSize+n<this.minSize)
				n=this.minSize-this.curSize;
		}
		if(n==0)
			return;
		this.curSize+=n;
		alist=this.adjustList;
		for(i=0;alist[i];i++){
			size=this.curSize*alist[i]['ratio'];
			size=Math.max(alist[i]['min'],size);
			size=Math.min(alist[i]['max'],size);
			list=dw_getElementsBySelector(alist[i]['sel']);
			for(j=0;list[j];j++){
				list[j].style.fontSize=size+this.sizeUnit;
			}
		}
		setCookie("fontSize",this.curSize,180,"/");
	},
	reset : function(){
		if(!this.curSize || !dw_fontSizerDX.ready)
			return;
		var alist=this.adjustList,list,i,j;
		for(i=0;alist[i];i++){
			list=dw_getElementsBySelector(alist[i]['sel']);
			for(j=0;list[j];j++){
				list[j].style.fontSize='';
			}
		}
		this.curSize=this.defaultSize;
		deleteCookie("fontSize","/");
	}
};
function dw_getElementsBySelector(selector){
	if(!document.getElementsByTagName)
		return[];
	var nodeList=[document],tokens,bits,list,col,els,i,j,k;
	selector=selector.normalize();
	tokens=selector.split(' ');
	for(i=0;tokens[i];i++){
		if(tokens[i].indexOf('#')!=-1){
			bits=tokens[i].split('#');
			var el=document.getElementById(bits[1]);
			if(!el)return[];
			if(bits[0]){
				if(el.tagName.toLowerCase()!=bits[0].toLowerCase())
					return[];
			}
			for(j=0;nodeList[j];j++){
				if(nodeList[j]==document || dw_contained(el,nodeList[j]))
					nodeList=[el];
				else 
					return[];
			}
		}else if(tokens[i].indexOf('.')!=-1){
			bits=tokens[i].split('.');
			col=[];
			for(j=0;nodeList[j];j++){
				els=dw_getElementsByClassName(bits[1],bits[0],nodeList[j]);
				for(k=0;els[k];k++){
					col[col.length]=els[k];
				}
			}
			nodeList=[];
			for(j=0;col[j];j++){
				nodeList.push(col[j]);
			}
		}else{
			els=[];
			for(j=0;nodeList[j];j++){
				list=nodeList[j].getElementsByTagName(tokens[i]);
				for(k=0;list[k];k++){
					els.push(list[k]);
				}
			}
			nodeList=els;
		}
	}
	return nodeList;
};
function dw_getElementsByClassName(sClass,sTag,oCont){
	var result=[],list,i;
	var re=new RegExp("\\b"+sClass+"\\b","i");
	oCont = oCont ? oCont : document;
	if(document.getElementsByTagName){
		if(!sTag||sTag=="*"){
			list=oCont.all ? oCont.all : oCont.getElementsByTagName("*");
		}else{
			list=oCont.getElementsByTagName(sTag);
		}
		for(i=0;list[i];i++)
			if(re.test(list[i].className))
				result.push(list[i]);
	}
	return result;
};
function getValueFromQueryString(varName,bReturn){
	var val="";
	if(window.location.search){
		var qStr=window.location.search.slice(1);
		var ar=qStr.split("&");
		var get=[],ar2;
		for(var i=0;ar[i];i++){
			if(ar[i].indexOf("=")!=-1){
				ar2=ar[i].split("=");
				get[ar2[0]]=ar2[1];
			}
		}
		val=get[varName];
		if(!val&&bReturn){
			val=qStr;
		}
	}
	return val;
};
function dw_contained(oNode,oCont){
	if(!oNode)
		return;
	while(oNode=oNode.parentNode)
		if(oNode==oCont)
			return true;
		return false;
};
if(!Array.prototype.push){
	Array.prototype.push=function(){
		for(var i=0;arguments[i];i++)
			this[this.length]=arguments[i];
		return this[this.length-1];
	}
};

String.prototype.normalize=function(){
	var re=/\s\s+/g;
	return this.trim().replace(re," ");
};
String.prototype.trim=function(){
	var re=/^\s+|\s+$/g;
	return this.replace(re,"");
};
var dw_Inf={};
dw_Inf.fn=function(v){
	return eval(v)
};
dw_fontSizerDX.ready=true;